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New Install HELP...serviceman coming tomorrow AGAIN!!!

Hello...
First let me say THANK YOU for this site..Tons of Good People and INFO!

I need some help with a new Install that was done in my house a week ago.

The system is an Amana (Goodman) 14 Seer outside unit, (3 ton) matching Evaporator coil and a new Amana Gas Furnace.

It is set up in a downflow setup.

This will be the third time I have to have the service man out to address a condensation problem.

They installed the TXV outside of the Exaporator housing, and it leaks condensation all over my floor!

To tell the truth, I have never seen a TXV located outside of the housing before, and given the amount of condensation it generates..It seems like it should have been located inside the evaporator from the start!

They either Made or had a Neoprene "Can" that goes over the valve and secures with Velcro...it has filled up with water twice, then overflows on the floor!

Should this be moved inside the housing where the condensation can be controlled??

Please, any advice would be great!!!

LarryQ

Last edited by LarryQ; 07-31-2008 at 09:59 PM.
Reason: reword to clarify

Two things that are required to get condensation. 1) A surface that is cold enough to make the moisture in the air condense on it. 2) The ability of the moist air to get to the cold surface.

You will need to insulate and seal the TXV from the air in your home. Doesn't need to look pretty if it's not in sight. I'd wrap it with a good quality soft foam insulation and then seal it completely with a vapor barrier such as plastic wrap. Try not to stick/glue anything directly to the TXV as if it needs to be checked the service tech might say a few things that you might take personal. Cover it like you'd be the one servicing it.

Nothing wrong with black duct tape. What's worse is someone that wraps something like this up with a full roll of black electrical tape and hides the end.

Use the biggest hammer you like, pounding a square peg into a round hole does not equal a proper fit.

Two things that are required to get condensation. 1) A surface that is cold enough to make the moisture in the air condense on it. 2) The ability of the moist air to get to the cold surface.

You will need to insulate and seal the TXV from the air in your home. Doesn't need to look pretty if it's not in sight. I'd wrap it with a good quality soft foam insulation and then seal it completely with a vapor barrier such as plastic wrap. Try not to stick/glue anything directly to the TXV as if it needs to be checked the service tech might say a few things that you might take personal. Cover it like you'd be the one servicing it.

Nothing wrong with black duct tape. What's worse is someone that wraps something like this up with a full roll of black electrical tape and hides the end.

that TXV may be adjustable (from the bottom if installed properly)

if its in a closet, you can slow down the rate of condensation (not suggesting that it doesn't need insulation) by conditioning the closet that this system is in a litte ammount of supply air in the closet will make a huge difference

I would use what the manufature recomends for insulation but you can pick up foam tape insulation @ any Home Hepot or Lowes. I have liked using cork tape insulation on odd shaped devices like txv's.

To whoever said they like to use cork tape. You obviously have never had to troubleshoot a txv after some idiot has wrapped it with cork tape. Takes like a half hour just to peel it off. It's not a good insulator instead use rubatex 1 and 1/8th by half inch wall, wrap it and strap it problem solved.

Check the original txv and see if it is not a model TX3N4, which is for use with a R410a system.

I don't much care for the insulation "cans" that come with those Parker txvs. I prefer cutting and slicing sections of insultube to fit tighter to the txv and tape the heck out of it over the insultube only.

To whoever said they like to use cork tape. You obviously have never had to troubleshoot a txv after some idiot has wrapped it with cork tape. Takes like a half hour just to peel it off. It's not a good insulator instead use rubatex 1 and 1/8th by half inch wall, wrap it and strap it problem solved.

I have had to troubleshoot many txv's wrapped with cork tape. If it was wrapped the wright way you just give it one good score with your knife and it has all ways peeled of easy enough for me. I like it because it is more moisture resistant than foam and, the man that trained me 5 years ago, who is a 30+ veteran in HVAC-R showed me the correct way to use it and remove it. I don't use it every were like some guys and there electrical tape.(wish I owned an electrical tape factory, I'd be rich) However, I will try your suggestion and see how I like it.